Granted Patent B2

US 12,206,979 · App. 17/828,228 · Granted Jan 21, 2025

Inventors: Takahiro Yoshioka (Tachikawa, JP); Takeshi Konno (Kawasaki, JP)

Assignee: FUJITSU LIMITED

H04N23/617G06T7/80G06V10/74H04N23/611G06T2207/30196

Abstract

Claims (23)

1. A non-transitory computer-readable recording medium storing an update program for causing a computer to execute processing comprising:

setting a range of a height of a person included in an image frame imaged by a camera on the basis of position information where the camera is provided;

specifying the height of the person included in the image frame based on a camera parameter of a position or a lens of the camera; and

updating the camera parameter based on a height of a person that is not included in the range in a case where the specified height of the person is not included in the range,

wherein the updating the camera parameter specifies a first feature amount from a foot portion to a head of the person in the image frame on the basis of a height of a person in the world coordinate system that is not included in the range and optimizes the camera parameter so as to minimize a difference between the first feature amount and a second feature amount from a foot portion to a head of a person specified from the image frame.

2. The non-transitory computer-readable recording medium according to claim 1 , wherein the specifying the height of the person specifies the height of the person by projecting coordinates on a foot portion and a head of the person included in the image frame on coordinates in a world coordinate system based on the camera parameter.

3. The non-transitory computer-readable recording medium according to claim 1 , wherein the updating the camera parameter updates the camera parameter by increasing a weight regarding the height that is not included in the range than the height included in the range among heights of a plurality of the persons included in the image frame.

4. An update method comprising:

setting, by a computer, a range of a height of a person included in an image frame imaged by a camera on the basis of position information where the camera is provided;

specifying the height of the person included in the image frame based on a camera parameter of a position or a lens of the camera; and

updating the camera parameter based on a height of a person that is not included in the range in a case where the specified height of the person is not included in the range,

wherein the updating the camera parameter specifies a first feature amount from a foot portion to a head of the person in the image frame on the basis of a height of a person in the world coordinate system that is not included in the range and optimizes the camera parameter so as to minimize a difference between the first feature amount and a second feature amount from a foot portion to a head of a person specified from the image frame.

5. The update method according to claim 4 , wherein the specifying the height of the person specifies the height of the person by projecting coordinates on a foot portion and a head of the person included in the image frame on coordinates in a world coordinate system based on the camera parameter.

6. The update method according to claim 5 , wherein the updating the camera parameter updates the camera parameter by increasing a weight regarding the height that is not included in the range than the height included in the range among heights of a plurality of the persons included in the image frame.

7. An information processing apparatus comprising:

a memory; and

a processor coupled to the memory and configured to:

set a range of a height of a person included in an image frame imaged by a camera on the basis of position information where the camera is provided;

specify the height of the person included in the image frame based on a camera parameter of a position or a lens of the camera; and

update the camera parameter based on a height of a person that is not included in the range in a case where the specified height of the person is not included in the range,

wherein a process to update the camera parameter specifies a first feature amount from a foot portion to a head of the person in the image frame on the basis of a height of a person in the world coordinate system that is not included in the range and optimizes the camera parameter so as to minimize a difference between the first feature amount and a second feature amount from a foot portion to a head of a person specified from the image frame.

8. The information processing apparatus according to claim 7 , wherein the processor specifies the height of the person by projecting coordinates on a foot portion and a head of the person included in the image frame on coordinates in a world coordinate system based on the camera parameter.

9. The information processing apparatus according to claim 7 , wherein the processor updates the camera parameter the imaging information by increasing a weight regarding the height that is not included in the range than the height included in the range among heights of a plurality of the persons included in the image frame.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (23)